Description

Acid Brown 50 is a synthetic acid dye belonging to the azo dye class, identified by CAS No. 12269-86-2. This high-performance dye is valued for its excellent color fastness, strong affinity for protein fibers, and consistent batch-to-batch quality, making it a reliable choice for industrial applications. It is primarily used by manufacturers in the textile, leather, and paper industries seeking durable and vibrant brown coloration.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve a range of brown shades with good wash and light fastness.
• Leather Finishing: Used in the dyeing of leather goods, including footwear, bags, and upholstery, providing rich and uniform color penetration.
• Paper Coloration: Employed in the production of specialty papers, packaging, and decorative papers where color consistency is critical.
• Ink Formulation: A component in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Wood Staining: Applied in the woodworking industry to enhance the grain and color of wooden surfaces.

Basic Information

Product Name	Acid Brown 50
CAS No.	12269-86-2
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	624.49 g/mol
Synonyms	Acid Brown 50; C.I. Acid Brown 50; Acid Leather Brown D; Acid Fast Brown G; Lissamine Brown B; Acid Brown G; Brown Acid G; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-[(2-hydroxy-1-naphthalenyl)azo]-5-[(4-sulfophenyl)azo]-, disodium salt
EINECS	235-543-6

Quality Control

Our Acid Brown 50 is manufactured under a strict quality management system to ensure it meets the high standards required for industrial dyeing processes. Every batch is tested for critical parameters including color strength, shade, solubility, and impurity profile to guarantee consistency and performance. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Brown powder or granules
Identification (IR)	Conforms to standard
Assay (Color Strength)	≥ 95%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 30.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 50 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.